<template>
	<view class="cart-container">
		<view class="" v-if="cart.length !== 0">
			<my-address></my-address>
			<!-- 购物车商品列表的标题区域 -->
			<view class="cart-title">
				<!-- 左侧的图标 -->
				<uni-icons type="shop" size="18"></uni-icons>
				<!-- 描述文本 -->
				<text class="cart-title-text">购物车</text>
			</view>
			<!-- 商品列表区域 -->
			<!-- uni-swipe-action  最外包裹的容器 -->
			<uni-swipe-action>
				<block v-for="(goods, i) in cart" :key="i">
					<!-- uni-swipe-action-item  可以节点提供 滑动效果 -->
					<uni-swipe-action-item :right-options="options" @click="swipeActionClickHandler(goods)">
						<my-goods :goods="goods" :show-radio="true" :show-num="true" @radio-change="radioChangeHandler"
							@num-change="numberChangeHandler"></my-goods>
					</uni-swipe-action-item>
				</block>
			</uni-swipe-action>
			<!-- 结算区域 -->
			<my-settle></my-settle>
		</view>
		<!-- 空白购物车区域 -->
		<view class="empty-cart" v-else>
			<image src="/static/cart_empty@2x.png" class="empty-img"></image>
			<text class="tip-text">空空如也</text>
		</view>
	</view>
</template>

<script>
	// 导入  mapGetters  这个辅助方法
	import {
		mapGetters
	} from "vuex"
	import {
		mapState,
		mapMutations
	} from "vuex"
	import badgeMix from "@/mixins/tabbar-badge.js"
	export default {
		mixins: [badgeMix],
		data() {
			return {
				// 滑动删除
				options: [{
					// 显示的内容
					text: "删除",
					style: {
						// 按钮的背景颜色
						backgroundColor: "#c00000"
					}
				}]
			}
		},
		methods: {
			...mapMutations("m_cart", ["updateGoodsState", "updateGoodsCount", "removeGoodsById"]),
			onShow() {
				// 在页面显示的时候   设置数字
				this.setBadge()
			},
			setBadge() {
				uni.setTabBarBadge({
					index: 2,
					text: this.total + ''
				})
			},
			// 商品的勾选状态发生了变化
			radioChangeHandler(e) {
				this.updateGoodsState(e)
			},
			// 商品的数量发生了变化
			numberChangeHandler(e) {
				this.updateGoodsCount(e)
			},
			// 点击了滑动操作
			swipeActionClickHandler(goods) {
				this.removeGoodsById(goods.goods_id)
			},
			...mapMutations("m_cart", ["updateGoodsState"]),

		},
		computed: {
			// 
			...mapGetters("m_cart", ["total"]),
			...mapState("m_cart", ["cart"]),
		}
	}
</script>

<style lang="scss">
	.cart-container {
		padding-bottom: 50px;
	}
	.cart-title {
		height: 40px;
		display: flex;
		align-items: center;
		font-size: 14px;
		padding-left: 5px;
		border-bottom: 1px solid #efefef;

		.cart-title-text {
			margin-left: 10px;
		}
	}
	.empty-cart {
		display: flex;
		flex-direction: column;
		align-items: center;
		padding-top:150px;
		.empty-img {
			width: 90px;
			height: 90px;
		}
		.tip-text {
			font-size: 12px;
			color: gray;
			margin-top: 15px;
		}
	}
</style>
